Stone Tokens is a quest to kill Dalaran wizards and gather the stone tokens that they use to control their elemental slaves. It is most effecient to do this quest at the same time as Prison Break In or Dalaran Patrols, as they take place in the same area.

A notable talent of the wizards of Dalaran is their familiarity with elementals: powerful creatures from other dimensions. The wizards use magical tokens as a means to control these elementals. Magus Voidglare would like some of these tokens to study.

Enter the territories of the Dalaran wizards, west of Hillsbrad, and gather the tokens.

You might find the tokens on any citizen of Dalaran, but I suggest hunting at the internment camp. It's safer than Dalaran itself.